Manufacture of vat dyestuffs of the anthraquinone series



Patented June 30, 1925.

,UNITED STATES PATENT OFFICE.

ARTHUR nfir ramomus Arm m Kaolin, or'mmnnam, GERMANY, ASSIGNORS TOBLDISCHE ANILIN- 8: SODA-FABBIK,

A CORPORATION OF GERMANY.

F LUDWIGSHAFEN-ON-BHINE, GERMANY,

MANUFACTURE OF DYESTUFFS OF THE A'NTHRAQUINONE SERIES,

No Drawing.

To all whom it may conoev'm."

Be it known that we, ARTHUR LUTTRING- Hans-and Frmr KAGER, citizens ofthe German Empire, residing at Mannheim, Germany,

have invented newand useful Improvements in the Manufacture of VatDyestufls of the Anthraquinone Series, of which the following is aspecification.

Vat dvestufls of the anthraquinone series can be readily obtained by theaction of fuming sulfuric acid on symmetrical tetra-halogenethane.

' s11 ma so an. ms 00 co i The process according to this'invention ismore .fully described by the following example to which however theinvention is not restricted. The parts are by weight. 10 parts of1-m-ercapto-2-aminoanthraqfliinone or of the disulfid compound derived40 t and 100 degrees centigrade, the color ofthe Application filedDecember 12, 1823. Serial No. 680,257.

containing a thiazol nucleus have already been described.

'The present invention relates to an improved process of manufacturingdyestuffs.

of the class mentioned which enables such products to be easilymanufactured and with excellent yield and consists in condensing formula'1-mercapto-2-aminoanthraquinone of the With the l-mercato-2-amino-anthraquinone itself emplo e the reaction is prob ablyrepresented y the following structural formulae which, however, being amatter of theory, does not constitute part of this invention:

solution which at the begi is eenish yellow turning thereby to yellowishred. When cool the mixture is introduced into water, the dyestufi'filtered oil and washed.

It may. be used for dgeing purposes directly or after further uri cationby boiling with sodium 11 poch orite solution or by revatting. nadvantageous method of workingup consists in moderately diluting thereaction mixture with water or watery sulfuric acid, instead of ouringit into water, thus fractionally precipitating the coloring matter,which is then obtained by filtration It dyes cotton yellowish shadeswith a distinct greenish hue.

What we claim is:

1. The process of producing vat dyestuffs of the anthraquinone serieswhich consists in a 1-mercapto-2-aminoanthrnquinone body with aglyoxalbody.

2. The process of producing vat dyestuffs of the anthraquinone serieswhich consists in condensing a 1-mercapto-2aininoanthraquinone body witha glyoxal body in the presence of a solvent.

3. The process'of producing vat dyestuffs 15 of the anthraquinone serieswhich consists in condensing in an acid medium aI-mercapto-Q-aminoanthraquinone body with glyoxa 4. The process ofproducing vat dyestufis of the anthraquinone series which consists incondensing in an acid medium a l-mercapto-2-aminoanthraquinone body witha glyoxul body in the presence of a solvent.

In testimony whereof we have hereunto set our hands.

ARTHUR LUTTRINGHAUS. F ILIP KACER. Witnesses: I

WILHELM SCHERER, ARTHUR DENONVILLE.

matter, which is then obtained by filtration It dyes cotton yellowishshades with a distinct greenish hue.

What we claim is:

1. The process of producing vat dyestufi's of the anthraquinone serieswhich consists in a l-mercapto-2-aminoanthraquinone body with a glyoxalbodty.

2. The process 0 producing vat dyestuffs of the anthraquinone serieswhich consists in condensing a 1-mercapto-2-aminoanthraquinone body witha glyoxal body in the presence of a solvent.

3. The processof producing vat dyestuffs 15 of the anthraquinone serieswhich consists in condensing in an acid medium al-mercapio-2-aminoanthraquinone body with glyoxa 4. The process ofproducing vat dyestuffs of the anthra quinone series which consists incondensing in an acid medium al-merczrpto-Q-aminoanthraquinone body witha. glyoxal body in the presence of a solvent.

In testimony whereof we have hereunto set our hands.

ARTHUR LUTTRINGHAUS. FILIP KAOER.

Witnesses:

WILHELM SCHEREB, ARTHUR DENONVILLE.

Certificate of Correction. It is hereby certified that in Letters Patent'No. 1,544,095, granted June 30, 1925,

ermany, for an improvement in The Anthraquinone Series, an error appearsf Art-hi1 Liittrin hens and Filip Kaer of Mannheim, u on the apphcatlon0 I Manufacture of Vet layestufis of the in the printed specificationrequiring correction as follows: Page 2, line 7 claim 1, after'the wordin insert the word condensing; and that the said Letters Patent shouldbe read Wit-ll this correction therein that the same may conform to therecord of the case in the Patent Office.

Signed and sealed this 21st day of Ju1y, A. D. 1925.

KARL FENNING, Acting Commissioner of Patents.

Certificate of Correction.

It is hereby certified that in Letters Patent No. 1,544,095, grantedJune 30, 1925, u on the application of Arthur Liittringhans and FilipKaer, of Mannheim ermany, for an improvement in The Manufacture of VatDyestufls of the Anthraquinone Series, an error appears in the printedspecification requiring correction as follows: Page 2, line 7, claim 1,afterthe word in insert the word condensing; and that the said LettersPatent should be read with this correction therein that the same mayconform to the record of the case in the Patent Oflice.

Signed and sealed this 21st day of July, A. D. 1925.

[SEAL] KARL FENNING,

Acting Commissioner of Patents.

